如何查找与 MongoDB 查询中数组条目完全相同的文档?
mongodbdatabasebig data analytics更新于 2026/2/17 0:52:17
为此，请使用 $all 运算符。首先，我们创建一个包含文档的集合。−
>db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["C++","Java","MongoDB"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd69a5f57806ebf1256f12e")
}
>db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["MySQL","Java","MongoDB"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd69ac057806ebf1256f12f")
}
>db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["C#","Python","MongoDB"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd69ad457806ebf1256f130")
}
>db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["MySQL","C","MongoDB"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd69adf57806ebf1256f131")
}
以下是使用 find() 方法显示集合中的所有文档的查询 −
> db.findDocumentExactlySameInArrayDemo.find().pretty();
这将产生以下输出 −
{
"_id" : ObjectId("5cd69a5f57806ebf1256f12e"),
"TechnicalSubjects" : [
"C++",
"Java",
"MongoDB"
]
}
{
"_id" : ObjectId("5cd69ac057806ebf1256f12f"),
"TechnicalSubjects" : [
"MySQL",
"Java",
"MongoDB"
]
}
{
"_id" : ObjectId("5cd69ad457806ebf1256f130"),
"TechnicalSubjects" : [
"C#",
"Python",
"MongoDB"
]
}
{
"_id" : ObjectId("5cd69adf57806ebf1256f131"),
"TechnicalSubjects" : [
"MySQL",
"C",
"MongoDB"
]
}
以下查询用于查找与查询中具有完全相同数组条目的文档 −
> db.findDocumentExactlySameInArrayDemo.find({"TechnicalSubjects": { "$all": ["MySQL","Java","MongoDB"] }});
这将产生以下输出 −
{ "_id" : ObjectId("5cd69ac057806ebf1256f12f"), "TechnicalSubjects" : [ "MySQL", "Java", "MongoDB" ] }
